A) It reacts with \[Ca{{C}_{2}}\]to produce \[{{C}_{2}}{{D}_{2}}\] and \[Ca{{(OD)}_{2}}.\]
B) It is used as a coolant in nuclear reactors.
C) It reacts with \[A{{l}_{4}}{{C}_{3}}\] to produce \[C{{D}_{4}}\] and \[Al{{(OD)}_{3}}.\]
D) It reacts with \[S{{O}_{3}}\]to form deuterated sulphuric acid \[({{D}_{2}}S{{O}_{4}}).\]
Correct Answer: B
Solution :
Heavy water \[({{D}_{2}}O)\] acts as moderator used to slow down the speed of neutrons in nuclear reactor, hence option (b) is incorrect.
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